K.A.
It's not what size you are choosing, it is the style and cut that is the issue.
You need to look for pants with a higher waist band. Wearing a low slung or "hip hugger" waist is not going to work because that style will just push that stretched skin up and over the waist band. If the rise isn't high enough when I look for jeans I could go up 3 or 4 sizes and never get rid of the shelf of skin all the while being a tent everywhere else. I have had 3 kids as well. If it doesn't come to around my belly button I can't wear them.